No. 2.] SPIDERS OF THE MARPTUS A GROUP. 115 



cephalothorax. The first row of eyes is curved. The middle 

 are fully twice as large as the lateral eyes, and are sub-touch- 

 ing, the lateral being a little separated from them, and placed 

 further back. The second row is plainly nearer the first than 

 the third. The dorsal eyes are almost equally distant from 

 each other and from the lateral borders, and form a row which 

 is not so wide as the cephalothorax at that place. The labium 

 is much longer than wide. The abdomen is long, cylindrical 

 and pointed, and, in the only two species that we have, is of a 

 pale yellow color, the cephalothorax being some shades darker. 



This genus is very close to Hyctia. The abdomen is the 

 same, and the legs of the first pair are much the longest and 

 heaviest, as in that genus. The cephalothorax, however, is of 

 a different shape ; the sides are not vertical nor parallel, and the 

 thoracic part slopes from the third row of eyes, instead of being 

 on the same plane as the cephalic. The cephalothorax, more- 

 over, is higher. The quadrangle of the eyes occupies two- 

 fifths, instead of one-third, of the length of the cephalothorax, 

 and the middle eyes of the first row are more prominent and 

 larger than in Hyctia, being fullj^ twice as large as the lateral 

 eyes. 



We found this genus on a new species from New Grenada.. 

 It includes Dr. Taczanowski's Marpissa isabellina, Araneides 

 du Perou, Bull. Soc. Imp. de Moscou, Tome LIII., p. 325. 



ITATA VADIA SP. NOV. 



Plate XL, Figs. 5—5/ 



S . Length, 8. Length of cephalothorax, 2.8 ; width of 



cephalothorax, 2. 

 ? . Length, 7.4. Length of cephalothorax, 2.5 ; width of 



cephalothorax, 1.8. 

 Legs, 14 32, in both sexes. Those of the first pair are long- 

 est and stoutest and are darker in color than the 

 others. 

 The falces are moderately stout ; in the female they are not 

 quite vertical and only moderately long ; in the male they are 

 longer and are plainly inclined forward. 



